AA 9602 then BA 482 at Heathrow
Dallas-Fort Worth → London → Barcelona
Timetable, London time
12:10AA 9602 from Dallas-Fort Worth at the gate
11:25BA 482 to Barcelona leaves the gate
23 h 15 apart on the timetable, overnight
BA 482 leaves 23 h 15 after AA 9602 arrives on the timetable: more than half a day, so not a connection we count.